제출 #173001

#제출 시각아이디문제언어결과실행 시간메모리
173001triSky Walking (IOI19_walk)C++14
0 / 100
164 ms8088 KiB
#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef long double ld; typedef pair<int, int> pi; typedef pair<ll, ll> pl; typedef vector<int> vi; typedef vector<ld> vd; typedef vector<ll> vl; #define pb push_back #define f first #define s second namespace debug { const int DEBUG = false; template<class T1, class T2> void pr(const pair<T1, T2> &x); template<class T, size_t SZ> void pr(const array<T, SZ> &x); template<class T> void pr(const vector<T> &x); template<class T> void pr(const set<T> &x); template<class T1, class T2> void pr(const map<T1, T2> &x); template<class T> void pr(const T &x) { if (DEBUG) cout << x; } template<class T, class... Ts> void pr(const T &first, const Ts &... rest) { pr(first), pr(rest...); } template<class T1, class T2> void pr(const pair<T1, T2> &x) { pr("{", x.f, ", ", x.s, "}"); } template<class T> void prIn(const T &x) { pr("{"); bool fst = 1; for (auto &a : x) { pr(fst ? "" : ", ", a), fst = 0; } pr("}"); } template<class T, size_t SZ> void pr(const array<T, SZ> &x) { prIn(x); } template<class T> void pr(const vector<T> &x) { prIn(x); } template<class T> void pr(const set<T> &x) { prIn(x); } template<class T1, class T2> void pr(const map<T1, T2> &x) { prIn(x); } void ps() { pr("\n"), cout << flush; } template<class Arg, class... Args> void ps(const Arg &first, const Args &... rest) { pr(first, " "); ps(rest...); } } using namespace debug; const int MAXN = 1e5 + 10; int N, M; vi l, r, y, cost; ll min_distance(vi x, vi h, vi iL, vi iR, vi iY, int s, int g) { l = iL; r = iR; y = iY; N = x.size(); M = l.size(); ps(M); priority_queue<pi, vector<pi>, greater<pi>> start; priority_queue<pi, vector<pi>, greater<pi>> end; cost.resize(M + 2, 1e9); for (int i = 0; i < M; i++) { start.push({l[i], i}); end.push({r[i], i}); } l.pb(0); r.pb(0); y.pb(0); cost[M] = 0; end.push({0, M}); bool sameH = true; int h0 = h[0]; for (int i = 1; i < N; i++) { if (h[i] != h0) { sameH = false; break; } } ps(N, M); if (s == 0 && g == N - 1 && sameH) { set<pi> active; active.insert({0, M}); for (int i = 0; i < N; i++) { while (end.size() && end.top().f < i) { pi tR = end.top(); end.pop(); active.erase({y[tR.s], tR.s}); } if (active.size() == 0) { return -1; } while (start.size() && start.top().f == i) { pi tI = start.top(); start.pop(); int cBridge = tI.s; pi cP = {y[cBridge], cBridge}; auto above = active.lower_bound(cP); int bestC = 1e9; if (above != active.end()) { int pBridge = (*above).s; bestC = min(bestC, cost[pBridge] + x[i] - x[l[pBridge]] + abs(y[pBridge] - y[cBridge])); // if (i == 3) { // ps("special"); // ps(x[i]); // ps(pBridge); // ps(cost[pBridge]); // ps(x[i] - l[pBridge]); // ps(abs(y[pBridge] - y[cBridge])); // ps(cBridge); // ps(bestC); // } } if (above != active.begin()) { auto below = --above; int pBridge = (*below).s; ps(pBridge); bestC = min(bestC, cost[pBridge] + x[i] - x[l[pBridge]] + abs(y[pBridge] - y[cBridge])); } active.insert(cP); cost[tI.s] = bestC; } // ps("after", i); // ps(active); } int fBridge = (*active.begin()).s; int ans = cost[fBridge] + x[N - 1] - x[l[fBridge]] + y[fBridge]; // ps(cost); return ans; } else { return -1; } }
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